Publish shard CC-MAIN-2026-08/00700
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/00700.parquet +3 -0
- stats.csv +1 -0
README.md
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Open Index is a large-scale web text dataset built from [Common Crawl](https://commoncrawl.org). Every page goes through a pipeline that extracts the main content from raw HTML, converts it to clean Markdown using [trafilatura](https://github.com/adbar/trafilatura), and packages the result into Parquet files with full WARC metadata preserved.
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The dataset currently includes crawl **CC-MAIN-2026-08** with **54,
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Open Index is released under the **Open Data Commons Attribution License (ODC-By) v1.0**, the same license used by Common Crawl.
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### Compression Ratios
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Numbers below are actual measurements summed across all
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| Stage |
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| Raw WARC (.warc.gz, downloaded) | ~2.2 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 6.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~116.
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| Final Parquet (Zstd level 19) | 78.4 GB | ~2.9 TB | **-32.5%** vs packed WARC |
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The big win is the HTML → Markdown step: trafilatura strips all tags, scripts, styles, navigation, and ads, keeping only the main content. This cuts 6.6 TB of uncompressed HTML down to 247.
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End to end: ~2.2 TB of raw gzipped WARCs becomes **78.4 GB of Parquet** — a **96.6% total reduction** — containing 54,
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### Processing Times
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Pipeline timings across
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```
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Download (raw WARC) ████████████████████████ total 254h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 13h 28m 50s avg 17s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 65h
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 20h 20m 12s avg 25s
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```
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Open Index is a large-scale web text dataset built from [Common Crawl](https://commoncrawl.org). Every page goes through a pipeline that extracts the main content from raw HTML, converts it to clean Markdown using [trafilatura](https://github.com/adbar/trafilatura), and packages the result into Parquet files with full WARC metadata preserved.
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The dataset currently includes crawl **CC-MAIN-2026-08** with **54,979,431 documents across 2837 shards**. We plan to add more snapshots over time.
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Open Index is released under the **Open Data Commons Attribution License (ODC-By) v1.0**, the same license used by Common Crawl.
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### Compression Ratios
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Numbers below are actual measurements summed across all 2837 files of CC-MAIN-2026-08 (54,979,431 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 2837 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~2.2 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 6.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~116.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 78.4 GB | ~2.9 TB | **-32.5%** vs packed WARC |
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The big win is the HTML → Markdown step: trafilatura strips all tags, scripts, styles, navigation, and ads, keeping only the main content. This cuts 6.6 TB of uncompressed HTML down to 247.4 GB of markdown — a **98.3% reduction** — before any file-level compression is applied. Parquet with Zstd level 19 then compresses the markdown a further 68.3%.
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End to end: ~2.2 TB of raw gzipped WARCs becomes **78.4 GB of Parquet** — a **96.6% total reduction** — containing 54,979,431 clean markdown documents.
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### Processing Times
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Pipeline timings across 2837 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 254h 37m 9s avg 5m 23s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 13h 28m 50s avg 17s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 65h 58m 7s avg 1m 23s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 20h 20m 12s avg 25s
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```
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data/CC-MAIN-2026-08/00700.parquet
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@@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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oid sha256:b794360c0757cfff678b377e9468e6dd576e7e14c4bbc6f18674e0078be79079
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size 31972545
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stats.csv
CHANGED
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@@ -700,6 +700,7 @@ CC-MAIN-2026-08,696,19502,2555585499,92879651,29934508,2026-03-14T23:07:44Z,589,
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| 700 |
CC-MAIN-2026-08,697,19204,2557886871,97097817,30458856,2026-03-14T23:17:53Z,564,0,71,18
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| 701 |
CC-MAIN-2026-08,698,19403,2562184326,98098610,31598215,2026-03-14T23:33:04Z,817,0,77,18
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| 702 |
CC-MAIN-2026-08,699,19651,2604029154,96392340,30460533,2026-03-14T23:43:38Z,582,0,70,112
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| 703 |
CC-MAIN-2026-08,701,19575,2592915946,93927019,29556184,2026-03-13T11:40:57Z,0,0,30,0
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| 704 |
CC-MAIN-2026-08,702,19449,2572639558,92293569,29617754,2026-03-13T11:49:10Z,0,432,59,0
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| 705 |
CC-MAIN-2026-08,703,19592,2602952509,95185029,30715031,2026-03-13T11:56:07Z,0,318,97,0
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| 700 |
CC-MAIN-2026-08,697,19204,2557886871,97097817,30458856,2026-03-14T23:17:53Z,564,0,71,18
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| 701 |
CC-MAIN-2026-08,698,19403,2562184326,98098610,31598215,2026-03-14T23:33:04Z,817,0,77,18
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| 702 |
CC-MAIN-2026-08,699,19651,2604029154,96392340,30460533,2026-03-14T23:43:38Z,582,0,70,112
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| 703 |
+
CC-MAIN-2026-08,700,19344,2553667609,96999976,31972545,2026-03-15T00:03:38Z,1010,0,191,0
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| 704 |
CC-MAIN-2026-08,701,19575,2592915946,93927019,29556184,2026-03-13T11:40:57Z,0,0,30,0
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| 705 |
CC-MAIN-2026-08,702,19449,2572639558,92293569,29617754,2026-03-13T11:49:10Z,0,432,59,0
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| 706 |
CC-MAIN-2026-08,703,19592,2602952509,95185029,30715031,2026-03-13T11:56:07Z,0,318,97,0
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